Differential.



C. H. BROWN.

DIFFERENTIAL.

APPLICATION FILED APIIJz. I9I7.

1,294,040., l IIIIenIed Feb. I1, 1919.4

2 SHEETS-SHEET l.

,4 TTOHNEVS WIT/VESSES C. H. BROWN.

` D|FFERENT|AL.

APPLICATION FILED APR. 26| I9I7.

Patented Feb. 11, 1919.

2 SHEETS-SHEET 2 A TTURNE YS CHARLES HENRY BROWN, OF EL PASO, TEXAS.

DIFFERENTIAL.

Laage.

Specification of Letters Patent.

Patented ren. ii, wie.

Application led April 26, 1917. Serial No. 164,593.

To all lwhom t may concern Be it known that I, CHARLES HENRY BROWN, a citizen of the United States, and a resident of El Paso, in the county of El Paso and State of Texas, have invented an Improvement in Diileren-tials, of which the fol,- lowing is a Specification.

' My invention is an improvement in dierentials for motor vehicles andl the like, and has for its object to provide a device of the character specified, wherein the sectionsof the axle are connected by a, worm gear to permit a slow differential movement without undue resistance, while turning a corner, for instance, but which will revent the axle sections from turning rea ily with respect to each other.

In the draw' Figure 1 is a ongitudinal section of the improved differential.

Fig. 2 is a section on the line 2-2 of Fig. 1, looking in the direction of the arrows adjacent to the line. i

Fi 3 is a view similar Ato Fig. 1 of a m ed form.

Fig. 4 is a section on the line 4 4 of l l the embodiment of the invention shown in Figs. 1 and 2, the axle sections 1 and 1 are journaled in housingsA 2 and` 2 in the form of hollow shafts, and each of these housings is provided at its inner end with an enlarl'ement 3 and 3, respectively, and

argements coperate with each journaled in bearings 10 and 11 in the sectional housing or gear casing 12 which incloses the dlferential. The housing seetions 2 and 2 are journaled in the easin 12 with ball bearings, as shown, and the erential kconnection is arranged within the casing formed by the enlargements 3 and 3 and t e 4. Y 4

Worm wheels 13 and 13 are secured to the axle sections 1 and 1, respectively, and these worm wheels, as shown, are threaded in the same direction.l Worm shafts 14, 14, 15, 15 are journaled in the housing 3-4, at right angles to the axle, and the worms 14 and 15 mesh with the worm wheel 1'3, while the worm shafts 14 and 15 mesh with the worm wheel 13. The worm wheels are arranged adjacent each other, and the shafts 14 and 14 are arranged directly opposite 60 14-14 and 15-15 are journaled in bearings 18 and 19 in the differential casing 3 4.

In the embodiment of the invention shown in Figs. 3 and 4, the axle sections 2O and 20 have worm wheels 21 and 21, respectively,

at their inner ends, the said worm wheels 7o being within the differential casing 22, corresponding to the casing 3-4 of Fig. 1. This casing is rigid with the hollow shafts or housing sections 23 and 23, in which the axle sections are journaled. The 24, corresponding to the ring 6 of ig. 1 is 'secured ,to the radial `rib 25 on the housing section 23, and the gear ring meshes with a pinion 26 on the drive shaft 27 journaled in the gear casing 28 corresponding to the gear casing 12.

It will be noticed that the worm r 21 is a left hand gear, whilthe gear 21 1s a ri ht hand gear. Worm shafts 29 are journa ed ghearring adjacent to the worm gear 21 and on oppose site sides thereof, and the said worms mesh with the gear 21. Other worm shafts each consisting of worm portions 30 and 31 are arranged adjacent to the worm gear 21, and the portion 30 of each of the said .worms meshes with the worm gear 21. The worm shafts 29 and 30-31 are arranged at right angles to each other, and the portion 31 'of each shaft 30-31, which is a left hand thread, meshes with the adjacent worm shaft ,29. The shafts 29 and 30-f31are'journaled in bearings 32 in the dierential housing.

The operation of the embodiment shown in Figs. 1 and 2 is as follows:

Under normal conditions the axle sections turn as one, the worm gear connection between the sections not readily permitting relative movement. ofA the two sections., However, as in turning a corner, for instance,l the section 1, will turn forwardly with respect to the section 1. cause the worm shafts 15 and 15 to turn with respect to the shafts 14 and 14, andthe axle section 1 may thus turn in the opposite d1-` rectionto the section 1.

`In Figs. 3 and 4 the action 1s the same. The worm wheels Vare connected by the worm shafts which are connected with each other through the worms 31, instead of throu h gear wheels. The wormA shafts and e worm gears may be of any pitch desired, 'it being understood that the pitch is the same in each set. But the fewer the threads and the smaller the pitch, the greater the friction on the differential action, andl consequently the more positive the drive to both wheels alike, regardless of road conditions.

I claim:

A diHerential gearing comprising in combination With the axle sections, a housing in which the sections are journaled, a casing in which the housing is rotatable, means for driving the housing, enlargemcA t at the meeting ends of the axle section and the said housing being sectional at the enlargement and the sections being detachably connected, lWorm Wheels secured said housing having an to the axle sections, worms meshing with the Worm Wheel, and a, driving connection ',betweer Uhe worms for constraining them to rotate in o posite directions, the worm being journ ed in the housing to move therewith. l

CHARLES HENRY BROWN.y 

